The beta mod can be found on the steam workshop and can be downloaded from
https://steamcommunity.com/sharedfiles/filedetails/?id=1552807725
Documentation for the Beta version is sparse, and development has eventually stopped. A good source of information is this youtube channel:
https://www.youtube.com/playlist?list=PL5U1AyYdFlukIJKvNiDkfDjfEhm_Yiozc
and of course our discord at https://discord.gg/tAdrVfv